0

file_exists不管用!!但是当浏览器中给出 url(代码中的 $img)时,会显示图像。我知道file_exists()只需要硬盘驱动器路径,但我能理解,请帮助..

include_once("../inc/inc_constants.php");

include_once("database/db.php");

include_once("includes/global.php");

ini_set('max_execution_time',300);

         $sql="select plan_image_name from mp_new_project_images
                  where project_code in
                  (select project_code from mp_new_project
                    where project_status='Active' ) ";

           $sql_result=mysql_query($sql) or die(mysql_error());



        while($sqlrow=mysql_fetch_array($sql_result))
        {
          //HOME is "http://ip address/"

    $img  = HOME."images/properties/thumbs_400/".$sqlrow['plan_image_name']." ";

    if(file_exists($img))
    {

    $dest =HOME."images/properties/thumbs_400/compress_50/".$sqlrow['plan_image_name']." ";
    $dest1=HOME."images/properties/thumbs_400/compress_20/".$sqlrow['plan_image_name']." ";
    $dest2=HOME."images/properties/thumbs_400/compress_10/".$sqlrow['plan_image_name']." ";

    $size = getimagesize($img);

    switch($size['mime']) {
        case 'image/jpeg':
            $im=imagecreatefromjpeg($img);
            imagejpeg($im,$dest,50);
            imagejpeg($im,$dest1,20);
            imagejpeg($im,$dest2,10);
        break;
        case 'image/png':
             $im = imagecreatefrompng($img);
             imagepng($im,$dest,50);
             imagepng($im,$dest1,20);
             imagepng($im,$dest2,10);
       break;
        case 'image/gif':
            $im = imagecreatefromgif($img);
            imagegif($im,$dest,50);
            imagegif($im,$dest1,20);
            imagegif($im,$dest2,10);
        break;
        default:
            return false;
        break;
        }
    }

}
4

3 回答 3

0

文件名不应是Path to the file or directoryIP 地址

'HOME' constant should be /var/www/html not ('http://url') for example 

$img  = HOME."images/properties/thumbs_400/".$sqlrow['plan_image_name']." ";

if(file_exists($img)) {

}
于 2013-09-04T10:31:19.427 回答
0

在 file_exisits 函数而不是 HOME 中使用物理路径。物理路径类似于“/var/www/public_html/”

使用 phpinfo() 函数知道物理路径

或者

利用

  dirname(__FILE__) . DIRECTORY_SEPARATOR 

正确地动态获取物理路径。

于 2013-09-04T10:35:14.867 回答
0

你有这个代码:

//HOME is "http://ip address/"

$img  = HOME."images/properties/thumbs_400/".$sqlrow['plan_image_name']." ";

if(file_exists($img))
{

不管用。函数 file_exists() 需要一个本地目录路径。您可以将 fopen() 用于远程路径。

$handle = fopen("http://www.example.com/", "r");

if (!$handle)
  {
    //no file
  }
else
  {
    // file exists
  }

http://php.net/manual/en/function.fopen.php

我相信它适用于 IP 地址,但要小心,因为 IP 地址经常被共享。

于 2013-09-04T10:39:30.250 回答